Improvement in sewing-machine carriages



G. H. CHINNOCK Improvement in Sewing-Machine Carriages.

PatentedJuflel8 1872.

Wz'messes.

UNITED STATES PATENT OFFICE.

GEORGE H. OHINNOGK, OF NEW YORK, N. Y.

Specification forming part of Letters Patent No. 128,113, dated June 18,1872.

To all whom it may concern:

Be it known that I, GEORGE H. CHINNOCK, of the city, county, and Stateof New York, have invented a new and useful Improved Carriage forSewing-Machines and Carpet- Protector, of which the following is aspecification:

The first part of this invention relates to a carriage or frame made ofwood or metal and provided with casters for supporting sewingmachincs insuch a manner as that they can be readily and easily moved from oneplace to another, and combining with said frame weighted serrated camsfor rendering the frame stationary when the machine is being used, theserrations on the peripheries of said cams bearing against the carpet orfloor and preventing the frame from moving, as it otherwise would do, onaccount of the casters. The second part of the invention consists incombining with a sewing-machine carriage having casters andlocking-cams, as hereinafter described, a carpetor floorprotector, madeof oil-cloth or thin board or other material, and secured to said frameto catch oil, 800., from the machine, thus preventing injury to thecarpet or floor. In the drawing illustrating this invention, Figure 1 isa top plan view of the carriage and protector, and Fig. 2 is a centralvertical longitudinal section, showing, specially, the weighted serratedcams.

A Arepresents the sides and ends of the carriage-frame, made of wood orcast in one piece of metal. a a a are casters secured in said frame,whereby it may be readily moved. I) b are strips of wood or metal,secured transversely underneath the sides A and near the ends. 0 c arecams, weighted at one of their ends and havingserrated peripheries, asshown in Fig. 2. These cams are secured eccentrically upon journals,preferably in slots 01 in the sides of the frame, or they may beattached outside or inside the frame upon separate journals; or upon asingle shaft, as indicated'by dotted lines in Fig. 1. Bysecuring them inslots in the frame, or inside the frame, the camswill be betterprotected and. less liable to be broken off or injured. The frame, wherethe cams are secured, is strengthened by providing additional strips 6e, if of wood or by double thicknesses of metal, if made of thatmaterial. Within the frame is secured a piece of oil-cloth, wood, ormetal, B, which constitutes the carpet-protector, its object being tocatch oil, &c., dropping from themachine.

The operation is as follows: The sewing-m achine is placed upon thecarriage with its feet resting upon the cross-pieces b b, and having theprotector B underneath it. The cams, on account of their eccentricity,weighted ends, and serrated peripheries, will always tend to catch thecarpet or floor; and hence,'when it is desired to move the machine, saidcams should be raised by the hand, for instance,

when the carriage can be readily and easily impelled, and when it stopsthe weight of the machine will press down upon the carriage, giving thecams a firm hold on the carpet or floor, so that the machine will notmove when being operated upon. The protector B saves the carpet andfloor from being soiled by grease, &c., falling from the machine.

It will thus be seen that my invention is useful in that it does awaywith the necessity of carrying the machine from one place to another,and also in that it protects the carpet or floor from oil, 860.

This device can be produced at a comparatively small cost, and will befound a great convenience to those using sewing-machines.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A carriage for supporting sewingmachines, provided with casters a andwith locking-cams or eccentrics c a, substantially as set forth, for thepurpose specified.

2. In combination with a carriage for supporting sewing-machinesprovided with casters a andlocking-cams c, I claim a carpet-protector,B, for the purpose specified.

To the above I have signed my name this 16th day of January, A. D. 1872.

GEORGE H. CHINNOCK.

Witnesses:

GEo. H. WEBB, J. D. BILLINGS,

